Since the differences in terms of PSNR or SSIM for the ablated models are hard to quantify as small or large with respect to the complete CNN, we conducted paired McNemar's significance testing [1]} to determine if the differences are statistically significant or not. We considered a p-value threshold of \(0.001\)  for our statistical testing. Every ablated model that is significantly different from the complete model is marked with \(\dagger \)  in Table REF . We note that the complete CNN is significantly better than each ablated version, although the actual differences in terms of PSNR or SSIM might seem small. We thus conclude that all the proposed enhancements provide significant performance gains.
